Matt Osbun

For Web developers, form validation is a basic task, and yet one that presents some interesting challenges. Even discounting security issues such as SQL injection attacks and cross-site scripting (XSS), form validation is a critical step in your error handling strategy. The two criteria I use to plan a form validation approach are extensibility and simplicity. Forms will change over time. It's like death and taxes, and much like those two events it's a lot better to plan for them before the fact, rather than after. When your form changes, how easy will it be to change your valid... (more)